The child components of each Column display the data for each row in
that column. The Column does not create child components per row;
instead, each child is repeatedly rendered (stamped) once per
row. Because of this stamping behavior, only certain types of
components are supported as children inside a Column. Supported
components include all components with no behavior and most
components that implement the EditableValueHolder or ActionSource
interfaces.

As each row is stamped, the data for the current row ( see
getRowData() on the Table)
is copied into an EL reachable property.
The name of this property is defined by the var
property on the Table. Once the Table has completed rendering, this
property is removed (or reverted back to its previous value). In
the following example, the data for each row is placed under the EL
property "row". Each Column displays the data for each row by getting
further properties from the "row" property:

Formatting

The Column component supports the following attributes related to
formatting:

align

The type of alignment to use for this column. This
atribute controls left/start, right/end, or center justification of the
column data.

width

The width of this column.

noWrap

Controls whether long lines of text in the column data should
be wrapped.

headerNoWrap

Controls whether long lines of text in the column header should
be wrapped.

separateRows

Controls whether each child of this
column should be rendered in separate cells, or inside the same
cell.

Sorting

In order to make this Column sortable, set the "sortable"
property to true and set "sortProperty" to the name of the
model that this column will sort. Sorting can be programatically
turned on with the setSortCritiera() method on the\
table.

Column Groups

<tr:column> tags can be nested to produce
groups of columns. The header of a column group spans across
all the columns it contains. The following example creates
a column group that has the header "Name" and contains
two sub columns with headers "First" and "Last":

Events

Type

Phases

Description

org.apache.myfaces.trinidad.event.AttributeChangeEvent

Invoke Application,
Apply Request Values

Event delivered to describe an attribute change. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.

Supported Facets

Name

Description

footer

the node to render as this column's footer.

header

the node to use to render this column's header.

Attributes

Name

Type

Supports EL?

Description

align

String

Yes

Valid Values:
start, end, center, left, right

The alignment for this column. The legal values are "start", "end" and "center", for left-justified, right-justified, and center-justified respectively in LTR display. The default value is "start".

attributeChangeListener

javax.el.MethodExpression

Only EL

a method reference to an attribute change listener. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.

binding

org.apache.myfaces.trinidad.component.core.data.CoreColumn

Only EL

an EL reference that will store the component instance on a
bean. This can be used to give programmatic access to a component
from a backing bean, or to move creation of the component to a backing bean.

defaultSortOrder

String

Yes

Valid Values:
ascending, descending

The default sort order of the column. The legal values are "ascending" or "descending" for ascending sorting or descending sorting on a first click respectively. The default value is "ascending".

headerNoWrap

boolean

Yes

whether or not the column header
should be allowed to wrap

headerText

String

Yes

text to display in the header of the column. This is a convenience that generates output equivalent to adding a "header" facet containing an outputText.

id

String

No

the identifier for the component. The identifier
must follow a subset of the syntax allowed in HTML:

Must not be a zero-length String.

First character must be an ASCII letter (A-Za-z) or an underscore ('_').

Subsequent characters must be an ASCII letter or digit (A-Za-z0-9), an underscore ('_'), or a dash ('-').

inlineStyle

String

Yes

the CSS styles to use for this component.

noWrap

boolean

Yes

whether or not the column contents should be allowed to wrap

onclick

String

Yes

an onclick Javascript handler.

ondblclick

String

Yes

an ondblclick Javascript handler.

onkeydown

String

Yes

an onkeydown Javascript handler.

onkeypress

String

Yes

an onkeypress Javascript handler.

onkeyup

String

Yes

an onkeyup Javascript handler.

onmousedown

String

Yes

an onmousedown Javascript handler.

onmousemove

String

Yes

an onmousemove Javascript handler.

onmouseout

String

Yes

an onmouseout Javascript handler.

onmouseover

String

Yes

an onmouseover Javascript handler.

onmouseup

String

Yes

an onmouseup Javascript handler.

partialTriggers

String[]

Yes

the IDs of the components that should trigger a partial update.

This component will listen on the trigger components. If one of the
trigger components receives an event that will cause it to update
in some way, this component will request to be updated too.

Identifiers must account for NamingContainers. You can use a single colon to start the search from the root,
or use multiple colons to move up through the NamingContainer. For example,
"::" will pop out of this component's naming container (it pops out of itself if it is a naming container),
":::" will pop out of two naming containers, etc. The search for
the partialTrigger begins from there. e.g., partialTriggers=":::commandButton1" the search begins for the
component with id = commandButton1 after popping out of two naming containers relative to this component.
To go into naming containers, you separate the naming containers with ':', e.g.,partialTriggers= "nc1:nc2:nc3:componentId".

rendered

boolean

Yes

whether the component is rendered. When set to false, no output will be
delivered for this component (the component will not in any way be rendered,
and cannot be made visible on the client).

rowHeader

boolean

Yes

Whether or not this column is a row header column.

separateRows

boolean

Yes

whether or not the children of this column should be rendered on separate rows. Setting this attribute to true will cause each child to render in its own row. Setting this to false will cause all the children to be rendered in one cell, which will rowSpan across the rows of the Columns whose children are rendered on separate rows.

shortDesc

String

Yes

The short description of the component. This text is commonly used by user agents to display tooltip help text.

sortProperty

String

Yes

The property that is displayed by this Column. This is the
property that the framework might use to (for example) sort
the Table's data.

sortable

boolean

Yes

whether or not the column is sortable. A sortable column has a clickable header that (when clicked) sorts the table by that column's property. Note that in order for a column to be sortable, this attribute must be set to "true" and the underlying model must support sorting by this column's property.

This column's "sortProperty" attribute must be set if sorting is desired.